The 2013 NFL season was an unusual one in that the balance of power did not shift all that much from start to finish. Yes, a few teams tumbled unexpectedly (Houston was No. 6 in our post-Week 1 Power Rankings, only to finish 2-14), and a few others exceeded expectations (Carolina and Arizona sat Nos. 26 and 28, respectively, after 0-1 opens).

But the Seahawks, Broncos, 49ers and Patriots -- the four teams that participated in the division-title round -- all maintained consistent spots atop the NFL pecking order throughout the season.